layui 拖拽上传图片 lay-data获取不了值

问题描述：
点击上传，选择文件上传，是可以获取到 lay-data 的值传递到后端
但拖拽上传图片，获取不到 lay-data 的值

解决方法：
添加隐藏域，记录操作的值

<input type="hidden" value="" id="deliver-id">

拖拽上传赋值

$(".deliver-img").on('drop',function(e){
	e.preventDefault();
    $("#deliver-id").val($(this).attr('lay-data'));
})
$(".deliver-img").on('dragover',function(e){
    e.preventDefault();
})

点击上传赋值

οnclick="$('#deliver-id').val({$goods_list.id})"

全部代码：

运单号：
<input type="hidden" value="" id="deliver-id">
<div class="layui-inline">
       {if !empty($goods_list['store_deliver_number']) && strpos($goods_list['store_deliver_number'], 'http') === 0}{else}
       <input type="text" class="layui-input deliver-input{$goods_list.id}" value="{$goods_list.store_deliver_number}" style="width: 130px;"  placeholder="填写发货运单号" onblur="changeStoreDeliver($(this),{$goods_list.id},{$goods_list.order_id})">
       {/if}
       {if (!empty($goods_list['store_deliver_number']) && strpos($goods_list['store_deliver_number'], 'http') === 0) || empty($goods_list['store_deliver_number'])}
       <div class="outer deliver-box" style="width: 60px;float: right;">
           <img src="/static/home/images/close.png" class="close close{$goods_list.id} {if $orderInfo.nameplate_img}show{/if}" onclick="delDeliverImg({$goods_list.id})" style="right: 20px;top: 0px;width: 15px;height: 15px;{if $goods_list.store_deliver_number}display:inline;{/if}">
           <div class="left_epc image-list" style="float: left;padding:0;height: 30px;background-color: #fff;">
               <div class="layui-upload">
                   <blockquote class="layui-elem-quote layui-quote-nm" style="float: left;border-style: none;padding:0px;">
                       <div class="layui-upload-list{$goods_list.id}" style="margin:0px;margin-top: 10px;">
                           {if $goods_list.store_deliver_number}
                           <a href="{$goods_list.store_deliver_number}" target="_blank"><img class="deliver-src" src="{$goods_list.store_deliver_number}" style="width: 30px;height: 30px;" /></a>
                           {/if}
                       </div>
                   </blockquote>
                   {if empty($goods_list.store_deliver_number)}
                   <div class="layui-upload-drag deliver-img" lay-data="{$goods_list.id}" onclick="$('#deliver-id').val({$goods_list.id})" style="padding:0px;width: 30px;height: 30px;line-height: 32px;font-size: 20px;margin-left:10px;" title="点击上传快递单图片或拖拉图片上传">
                       <p>+</p>
                   </div>
                   {/if}
               </div>
           </div>
       </div>
       {/if}
   </div>

$(".deliver-img").on('drop',function(e){
	e.preventDefault();
    $("#deliver-id").val($(this).attr('lay-data'));
})
$(".deliver-img").on('dragover',function(e){
    e.preventDefault();
})
layui.use('upload', function(){

        var $ = layui.jquery
            ,upload = layui.upload;

        // 上传运单图
        upload.render({
            elem: '.deliver-img'
            ,url: "{:url('admin/Xsorder/ajaxUploadDeliver')}"
            ,done: function(res){
                var id = $("#deliver-id").val();
                var imgurl = res.data.imgurl;
                $.ajax({
                    url:"{:url('admin/Xsorder/ajaxSetDeliver')}",//发送的路径
                    data:{id:id,img_url:imgurl},//发送的数据
                    type:"post",//发送的方式
                    dataType:"json",//服务器返回的数据类型
                    success: function(res2) {
                        if(res2.code==200){
                            $('.deliver-input'+id).hide();
                            $('.deliver-box .close'+id).show();
                            $('.deliver-box .layui-upload-list'+id).html('<a href="'+res2.data.imgurl+'" target="_blank"><img class="deliver-src" src="'+res2.data.imgurl+'" style="width: 30px;height: 30px;" /></a>');
                            layer.msg('上传成功');
                        }else{
                            layer.msg(data.msg);
                        }
                    },
                    error: function (data){
                        layer.msg('网络错误，请稍后重试');
                    }

                });
            }
        });

    });